Fatigue crack growth prediction models for metallic materials Part II: Strip yield model - choices and decisions
Fatigue crack growth prediction models for metallic materials Part II: Strip yield model - choices and decisions
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DOI：
10.1111/ffe.12009
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发表时间：
2013-04
影响因子：
3.7
通讯作者：
T. Machniewicz
中科院分区：
文献类型：
--
作者：
T. Machniewicz
确定性模型，以预测金属材料的疲劳裂纹扩展被认为是特别强调的方法，适用于变幅载荷的历史。第一部分简要回顾了现有的模型及其评估的基础上，在文献中报道的预测和观察结果之间的比较。得出的结论是，所谓的条带屈服模型的基础上的塑性诱导裂纹闭合机制是一个最通用的预测工具，方便使用的情况下，在任意变幅载荷下的模式I裂纹扩展。论文的第二部分重点介绍了带钢产量模型及其预测能力。这种类型的预测方法在文献中报道的实施进行了审查。结果表明，关于约束因子的概念，裂纹驱动力参数的选择，裂纹扩展速率的描述和各种数值细节的决定可以有深远的影响模型的结果和预测质量。
Deterministic models developed to predict fatigue crack growth in metallic materials are considered with special emphasis on approaches suitable for variable amplitude load histories. Part I gave a concise review of available models and their assessment based on reported in the literature comparisons between predicted and observed results. It was concluded that the so-called strip yield model based on the plasticity-induced crack closure mechanism is a most versatile predictive tool convenient to use in the case of mode I crack growth under arbitrary variable amplitude loading. Part II of the paper is focused on the strip yield model and its predictive capabilities. Implementations of this type prediction approach reported in the literature are reviewed. It is shown that decisions regarding the constraint factor conception, a choice of the crack driving force parameter, the crack growth rate description and various numerical details can have a profound effect on the model results and the prediction quality.